122521231 has 4 divisors (see below), whose sum is σ = 140024272. Its totient is φ = 105018192.

The previous prime is 122521219. The next prime is 122521237. The reversal of 122521231 is 132125221.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 132125221 = 19 ⋅6953959.

It is a cyclic number.

It is not a de Polignac number, because 122521231 - 2⁷ = 122521103 is a prime.

It is a super-2 number, since 2×122521231² = 30022904091510722, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 122521199 and 122521208.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (122521237) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8751510 + ... + 8751523.

It is an arithmetic number, because the mean of its divisors is an integer number (35006068).

Almost surely, 2^122521231 is an apocalyptic number.

122521231 is a deficient number, since it is larger than the sum of its proper divisors (17503041).

122521231 is an equidigital number, since it uses as much as digits as its factorization.

122521231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17503040.

The product of its digits is 240, while the sum is 19.

The square root of 122521231 is about 11068.9308878500. The cubic root of 122521231 is about 496.6728843768.

Adding to 122521231 its reverse (132125221), we get a palindrome (254646452).

The spelling of 122521231 in words is "one hundred twenty-two million, five hundred twenty-one thousand, two hundred thirty-one".